<!DOCTYPE html>
<html>
<!--
Copyright 2008 The Closure Library Authors. All Rights Reserved.

Use of this source code is governed by the Apache License, Version 2.0.
See the COPYING file for details.
-->
<!--
  Author: arv@google.com (Erik Arvidsson)
-->
<head>
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<title>Closure Unit Tests - goog.fx.CssSpriteAnimation</title>
<script src="../base.js"></script>
<script>
  goog.require('goog.fx.CssSpriteAnimation');
  goog.require('goog.math.Box');
  goog.require('goog.math.Size');
  goog.require('goog.testing.MockClock');
  goog.require('goog.testing.jsunit');
</script>
<style>

#test {
  width: 10px;
  height: 10px;
}

</style>
</head>
<body>

<div id="test"></div>

<script>

var el = document.getElementById('test');
var size = new goog.math.Size(10, 10);
var box = new goog.math.Box(0, 10, 100, 0);
var time = 1000;
var anim, clock;

function setUpPage() {
  clock = new goog.testing.MockClock(true);
}

function tearDownPage() {
  clock.dispose();
}

function setUp() {
  anim = new goog.fx.CssSpriteAnimation(el, size, box, time);
  anim.play();
}

function tearDown() {
  anim.clearSpritePosition();
  anim.dispose();
}

function assertBackgroundPosition(x, y) {
  if (typeof el.style.backgroundPositionX != 'undefined') {
    assertEquals(x + 'px', el.style.backgroundPositionX);
    assertEquals(y + 'px', el.style.backgroundPositionY);
  } else {
    var bgPos = el.style.backgroundPosition;
    var message = 'Expected <' + x + 'px ' + y + 'px>, found <' + bgPos + '>';
    if (x == y) {
      // when x and y are the same the browser sometimes collapse the prop
      assertTrue(message,
                 bgPos == x || // in case of 0 without a unit
                 bgPos == x + 'px' ||
                 bgPos == x + ' ' + y ||
                 bgPos == x + 'px ' + y + 'px');
    } else {
      assertTrue(message,
                 bgPos == x + ' ' + y ||
                 bgPos == x + 'px ' + y ||
                 bgPos == x + ' ' + y + 'px' ||
                 bgPos == x + 'px ' + y + 'px');
    }
  }
}

function testAnimation() {
  assertBackgroundPosition(0, 0);

  clock.tick(5);
  assertBackgroundPosition(0, 0);

  clock.tick(95);
  assertBackgroundPosition(0, -10);

  clock.tick(100);
  assertBackgroundPosition(0, -20);

  clock.tick(300);
  assertBackgroundPosition(0, -50);

  clock.tick(400);
  assertBackgroundPosition(0, -90);

  // loop around
  clock.tick(100);
  assertBackgroundPosition(0, 0);
}

function testClearSpritePosition() {
  assertBackgroundPosition(0, 0);

  clock.tick(100);
  assertBackgroundPosition(0, -10);
  anim.clearSpritePosition();

  if (typeof el.style.backgroundPositionX != 'undefined') {
    assertEquals('', el.style.backgroundPositionX);
    assertEquals('', el.style.backgroundPositionY);
  }

  assertEquals('', el.style.backgroundPosition);
}

</script>
</body>
</html>
